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équilibrer une réaction


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image.thumb.png.81d8e6a29f47cab3eeb3e36564a32166.png

 

Avez-vous une explication plus précise de comment savoir quel est le coefficient stoechimétriques à mettre ? Comment savoir quelle couple subit une oxydation ou réduction svp ? quel est le critère à voir ? 

image.png.79791e3a80b4e7a41d8730f5bce4fb98.png

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